Today I learned a good one. Before fingering, check your nails by scraping them against the inside of your cheek. If you can feel the nail scratching, its not good enough.

What's your most useful tip or trick in the hobby

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... put the envelope with the donation between two inner pages. Fold the magazine in half the short way.  

The envelope is invisible to the casual observer and also will not fall out.

Useful during your walk across the hotel lobby and ride up the elevator...

And do remember to "erase" the recipient name & address on the front page.

I always bring a gym bag with my own soap, deodorant, etc...and no kissing or hugging goodbye.  This way I leave smelling like my usual self and won't have any lingering feminine scents.

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Sometimes I book several days ahead with a girl visiting from out of state.  I always confirm the evening before...things can change.

If I need to drive into Boston (have been able to avoid this for a good while) always reconfirm again before getting into the car.  If no answer, I leave a message that someone needs to call or text before I make the drive.